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Yoshio- as a lubricant, you can buy silicone oil commercially, and mix it with naptha, also easily available (at least it is here in the U.S.) 8 parts naptha to one part silicone oil makes a good lubricant for piano parts. Caution: never allow any kind of lubricant near the strings or tuning pins. If you are lubricating parts, be sure to blow out the dust first. There are technicians who are not comfortable with silicone anywhere near a piano for fear of hurting the pinblock. I have never had a problem with that, but once again, I caution you to use care........Sam

I hope you aren't planning to use it anywhere on a piano! Silicone migrates. Its molecules literally become airborn and travel to places you didn't intend for it to gom like the pinblock. Get it on the finish and if you ever refinish the piano you'll have three times the work trying to get the new finish to flow out. You should *never* use a silicone product on a piano.

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I really dont want to get the silicone thread started again, but I will restate (as a piano tech and refinisher) that silicone properly used will not hurt the piano (Baldwin used it in the factory) or the finish (silicone contamination is easily corrected prior to spot finishing or full finishing- we do it automatically). Silicone on a finish can be neutralized with naptha. However, I do agree that ProTek is a great choice, but did not know if its available in Japan for Yoshio.....Respectfully, Sam

Everyone is grateful.I'ｍ going to use the silicone oil at center−pins. I was very much interested in the following sentence."mix it with naptha, also easily available (at least it is here in the U.S.) 8 parts naptha to one part silicone oil "

"Its molecules literally become airborn and travel to places"

"Baldwin used it in the factory"

"ProTek is a great choice Silicone on a finish can be neutralized with naptha." "Protek"

I will use the oil carefully.Ｔhank you many adviceｓ and kindness．Yoshio

I use wd40 for centerpins and on the vbar when raising the pitch 100 cents or so. I do not use the aresol kind, but rather the liquid which can be bought in gallon containers. I apply it as I do protec with a hypodermic needle. I have never had a problem with it. Keep it away from the tuning pins. Hyopdermic needles may be bought over the counter in New Mexico. They are also great for applying CA glue. A large animal syringe can be used to apply gap filling CA glue. By them at veterinary supply stores. I have been told that lighter fluid makes a good centerpin lubricant in a pinch. I have never tried it. I like the clear Maclube for front and balance rail pins after polishing. I like Slideall for lubricating the piano bed to help slide in the action. Lubricants are interesting. Any other ideas?

From what I've heard, it is unwise to use WD40 on the center pins bushings because it will tend to attract dirt and actually worsen sluggishness. For some time now, I've used protek and gotten excellent results--even with the verdigris problem encountered in older Steinways(except that it tends to put that problem in remission and the sluggishness inevitably returns).